https://www.youtube.com/watch?v=H6y0D_8kRoU&t=14s
I'm Manuel, a German Physician (M.D.) - Here are my Hand Exercises for Gamers. It's a follow-along routine that just takes five minutes of your time. You can use them even if you're not a gamer, they are also hand exercises for guitar, or hand exercises for women and men that have weak hands after e.g. surgery.
